Sexual behaviour and sexually transmitted infection among African and Caribbean men in London.

We studied 180 black heterosexual men of whom 133 (74%) were Caribbean and 47 (26%) African. Seventy-three per cent of Caribbeans and 27% of Africans were UK born. We found no difference in age, but more Africans were married (30% cf 10%; P=0.002) and students (26% cf 10%; P=0.00008). More Caribbeans smoked 1-10 cigarettes a day (42% cf 22%; P=0.02) and more drank alcohol (89% cf 74%; P=0.002). Sixty-nine per cent of Caribbeans reported intercourse before the age of 17 compared with 48% of Africans (P=0.004), but there was no difference in the numbers of sexual partners, either in the previous year or in total. Twenty-four (18%) of the 133 Caribbeans had gonorrhoea compared with one (2%) of the 47 Africans (P=0.001). Multivariate analysis showed that coitarche under 16 years of age (odds ratio (OR) 50) and gonococcal and/or chlamydial infection (OR 12.5) were independently associated with Caribbeans. Within this group, gonorrhoea was found more often in teenagers (OR 9.5) who had commenced intercourse before the age of 16 (OR 3.3) and chlamydial infection in those with multiple partners (OR 24). New problem-orientated approaches are needed to eradicate these curable infections which facilitate infection with HIV.